Sigma Key is a powerful flashing tool for MTK, QUALCOMM, HI-SILICON, AND IT OMAP based smartphones. Having the full support of reading, writing, repairing IMEI, and full support of unlocking all types of locks like FRP and read pattern lock on USB and ADB mode. Here we are going to share with you the latest setup of the tool which is the v 2.42.04. This flash tool has full support for the world's most popular brands on the market like Sony, Huawei, ZTE, Motorola, and a lot of other MTK and Qualcomm-based smartphones. Sigma is an easy tool for users for flash or unlocks or repair IMEI having a different type of 3 packs and giving you support of different smartphones. Every Sigma owner can activate Pack 3 and get access to these particular and future features, which will be introduced in this Pack.